SIST EN 3459:2010

Overview

EN 3459:2010 is a CEN (ASD‑STAN) aerospace material standard that specifies requirements for titanium alloy TI‑P63001 (Ti‑4Al‑4Mo‑2Sn) in the form of solution treated and aged plate with thickness range 6 mm < a ≤ 50 mm. It defines chemical composition limits, heat treatment/delivery condition, mechanical property limits, microstructure and inspection requirements targeted at aircraft and aerospace structural applications.

Key topics and technical requirements

• Material designation: TI‑P63001 (Ti‑4Al‑4Mo‑2Sn).
• Chemical composition: Specified limits for Al, Mo, Si, Sn and interstitials (O, N, H) and impurities (Fe, C, etc.) as given in the standard.
• Form and production: Wrought plate, thickness 6 mm < a ≤ 50 mm; method of melting per EN 4800‑001.
• Delivery condition / heat treatment: Solution treated and aged. Typical heat treatment shown in the standard: 900 °C ± 10 °C / t ≥ 20 min / AC + 500 °C ± 10 °C / t = 24 h / AC (delivery condition code U).
• Mechanical properties (typical limits quoted):
  • Proof stress Rp0,2: ≥ 900 MPa (some conditions ≥ 920 MPa depending on thickness/direction).
  • Tensile strength Rm: 1 030 ≤ Rm ≤ 1 220 MPa.
  • Elongation A: ≥ 9 % (≥ 7 % for some thickness/direction cases).
  • Reduction of area Z: ≥ 20 %.
• Microstructure and non‑destructive testing: Microstructure acceptance criteria referenced to EN 4800‑001 and EN 3114‑003; ultrasonic inspection per EN 4050‑1 and acceptance per EN 4050‑4.
• Inspection, marking and defects: Dimensional, marking, surface contamination and internal/external defect criteria are handled per EN 4800‑001.
• Product qualification: Qualification programme to be agreed between manufacturer and purchaser.

Applications and who uses this standard

• Primary users: aerospace materials engineers, aircraft structural part manufacturers, procurement/specification engineers, quality assurance and inspection teams, and suppliers of titanium plate for aerospace structures.
• Typical applications: high‑strength aerospace structural components where a solution treated and aged Ti‑4Al‑4Mo‑2Sn plate is specified for its mechanical performance and fracture/toughness balance (e.g., airframe elements, fittings and structural stiffeners).
• Practical value: ensures consistent chemistry, mechanical properties, heat treatment practice and inspection acceptance across the supply chain for critical aerospace titanium plate.

Related standards (normative references)

• EN 4800‑001 (plate/sheet technical specification)
• EN 3114‑003 (microstructure test for α+β titanium plates)
• EN 4050‑1 / EN 4050‑4 (ultrasonic inspection and acceptance)
• EN 2043, EN 4258, EN 4500‑4 (general aerospace metallic material rules and organization)

Keywords: EN 3459:2010, TI‑P63001, Ti‑4Al‑4Mo‑2Sn, titanium plate standard, solution treated and aged, aerospace titanium, mechanical properties, ultrasonic inspection, microstructure.